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5. Which of the following statements about the hysteresis curve below is correct? (A) The magnetization behavior of a magnetic material depends only on the externally applied magnetic field. (B) At point (1), the magnetic material is fully de-magnetized. (C) At point (2), residual magnetic field is left in the magnetic material even without the presence of external magnetic field. (D) None of the above is correct.

6. An infinitely long, straight conducting wire with a circular cross section of radius $b$ carries a steady current $I$ that is flowing upward (along the $\hat{\mathbf{z}}$ direction). Which of the following statements is correct? (A) Viewing from the top the magnetic field $\pmb{B}$ is circulating clockwise around the wire. (B) Inside the wire, the magnitude of the magnetic field $|\pmb{B}|$ at a point of interest scales linearly with the distance of that point away from the center of the wire. (C) Outside the wire, the magnitude of the magnetic field $|\pmb{B}|$ at a given point decreases with the square of its distance from the center of the wire. (D) None of the above is correct.

8.下引詩句,都有季節景物的描寫,若依春夏秋冬時序排列,正確的選項是: 甲、接天蓮葉無窮碧, 映日荷花別樣紅。 乙、無情最是臺城柳,依舊煙籠十里堤。 丙、雲橫秦嶺家何在?雪擁藍關馬不前。 丁、停車坐愛楓林晚,霜葉紅於二月花。 (A)乙甲丁丙 (B)甲乙丙丁 (C)丙丁甲乙 (D)丁丙甲乙

43.CYP 酵素與下列何種氣體形成的複合物,於波長 450 nm 處有極大吸收? (A)N2 (B)O2 (C)CO2 (D)CO

1. 某輪船速15節,當船順流2節時,則相對計程儀顯示的航速應為幾節?此時實際船速為幾節? (A)15;12 (B)17;15 (C)17;17 (D)15;15

30. 下列何種採購不允許採統包方式辦理? (A)建築工程 (B)勞務採購 (C)財務採購 (D)橋梁工程