(单选题)26: She missed the plane, ______ driving very fast to the airport. ( ) A: according to B: because of C: despite of D: in spite of ...

(单选题)20: Identify the errors in the following sentence:If that is case, you will have to work harder. ( ) A: is B: case C: have to D: harder ...

(单选题)14: Identify the errors in the following sentence:Most people know to have their blood pressure taken but few understand what the numbers that are used to record blood pressure mean. ( ) A: Most people B: to have C: the numbers ...

(单选题)8: The teacher asked them to ______ the selected material after class. ( ) A: go over B: take out C: skim on D: examine with ...

(单选题)2: One of his many faults is that he never ______ anything very long. ( ) A: decides on B: sticks to C: goes over D: makes sure ...

(单选题)96: 逆转录酶的底物之一是??( ) A: AMP B: ATP C: dAMP D: dATP E: GDP ...

(单选题)90: DNA半保留复制不需要??( ) A: DNA聚合酶 B: DNA连接酶 C: 氨酰tRNA合成酶 D: 冈崎片段 E: 引物酶 ...

(单选题)84: 能直接生成γ-氨基丁酸的是??( ) A: 半胱氨酸 B: 谷氨酸 C: 酪氨酸 D: 鸟氨酸 E: 色氨酸 ...

(单选题)78: 下列叙述错误的是??( ) A: S-腺苷同型半胱氨酸是甲硫氨酸循环中的中间产物 B: 甲硫氨酸循环是耗能的过程 C: 甲硫氨酸循环需要维生素B12及叶酸参加 D: 甲硫氨酸循环与机体内很多合成代谢有关 E: 经甲硫氨酸循环可合成甲硫氨酸，故甲硫氨...

(单选题)72: 氨中毒的根本原因是??( ) A: 氨基酸在体内分解代谢增强 B: 肠道吸收氨过多 C: 肝损伤不能合成尿素 D: 合成谷氨酰胺减少 E: 肾功能衰竭导致氨排出障碍 ...