74. 左圖之右側視圖是
(A)
(B)
(C)
(D) 。

75. 三角柱為 (A)三面體 (B)五面體 (C)四面體 (D)六面體。

76. 中心線的延長線可以代替 (A)尺度界線 (B)輪廓線 (C)虛線 (D)尺度線。

77. 在組合剖面中，下列零件不得塗黑的是 (A)把手 (B)彈簧 (C)薄墊圈 (D)鐵板。

78. 下列何者非屬應對在職勞工施行之健康檢查？ (A)特殊健康檢查 (B)體格檢查 (C)特定對象及特定項目 之檢查 (D)一般健康檢查。

79. 表面粗糙度的單位為 (A)cm (B)㎜ (C)μm (D)dm。

80. 在 MS 視窗作業系統中，要選取多個非連續的檔案，在選取前須先按住 (A)Ctrl 鍵 (B)Alt 鍵 (C)Shift 鍵 (D)Ins 鍵。

1A new organism was discovered in the forests of Costa Rica. Scientists determined that the new organism's hemoglobin polypeptide sequence differs by 72 amino acids from humans, 65 from a gibbon, 49 from a rat, and five from a frog. These data suggest that the new organism is more closely related to _______.(A)humans than to frogs(B)frogs than to humans(C) rats than to frogs(D)gibbons than to rats

2 An enzyme is composed of four identical subunits. Substrate binding to one subunit stimulates more rapid substrate binding to the other three subunits. Which of the following mechanisms is this enzyme most likely regulated?(A)noncompetitive inhibition(B)competitive activation(C) competitive inhibition(D)cooperativity

3 Which of the following statements provides the most plausible explanation for the results of this experiment?(A)The two sponge species had different enzymes that functioned in the reassembly process.(B)The molecules responsible for cell-cell adhesion (cell junctions) were irreversibly destroyed during the experiment.(C) The molecules responsible for cell-cell adhesion (cell junctions) differed between the two species of sponge.(D)One cell functioned as an organizer for each organism, attracting only cells of the same species.

4Human immunodeficiency virus (HIV) infects cells with CD4 and CCR5 cell nolecules. The viral nucleic acid molecules are enclosed in a protei m and the protein capsid is contained inside an envelope consisting of a lipid bilayer membrane and viral glycoproteins. One hypothesis for viral entry into cells is that the ng of HIV membrane glycoproteins to CD4 and CCR5 initiates the fV membrane with the plasma membrane, releasing the viral capsicytoplasm. An alternative hypothesis is that HIV gains entry into the cell via receptor-mediated endocytosis, and membrane fusion occurs in the endocytotic vesicle. To testthese alternative hypotheses for HIV entry, researchers labeled the lipids on the HIV membrane with a red fluorescent dye. What would be observed by live-cell fluorescence microscopy immediately after HIV entry if HIV enters the cell by endocytosis first and then later fuses with the endocytotic vesicle membrane?(A)The infected cell's plasma membrane will show a spot of red fluorescence, marking the site of membrane fusion and HIV entry.(B)The red fluorescent dye-labeled lipids will appear in the infected cell's interior.(C) A spot of red fluorescence will diffuse in the infected cell's cytoplasm.(D) A spot of red fluorescence will remain outside the cell after delivering the viral capsid.

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