氧气/天然气比增加，气化炉的反应温度将（）。 A.升高 B.降低 C.不变 D.不一

下图为动物体内一神经肌肉接点的结构示意图，下列有关该结构的一些说法中，正确的是

①图中a为神经元细胞的树突或轴突的末梢 ②e内为组织液，当其中的Na⁺含量过低时容易导致肌肉不能正常收缩 ③b中的物质释放到e需要消耗能量并依赖于c的流动性 ④d处的膜面积增大，有利于膜上的载体蛋白对递质的吸收

A．①③

B．②③

C．②④

D．③④

《建设工程工程量清单计价规范》统一规定了项目编码。项目编码共设12位数字，某分部工程的前4位编码是0301，其含义是（）。

A．电气设备安装工程

B．热力设备安装工程

C．机械设备安装工程

D．切削设备安装工程

下列不属于井喷控制费用保险除外责任的是( )。

A．人身伤亡、疾病、死亡、社会保险赔偿范围内的损失

B．爆喷出来的流散物质的清除和防止扩散费用

C．油(气)井眼的灭失及钻井工具灭失和丧失使用

D．一切打捞费用，为重新钻探作业的整理费用

病毒性心肌炎常见的病原体是()。

A．风疹病毒

B．柯萨奇病毒乙组

C．埃可病毒

D．腺病毒

E．流感病毒

Did you ever have someone’s name on the tip of your tongue and yet you were unable to recall it (1) this happens again, do no (2) to recall it. Do something (3) for a couple of minutes, (4) the name may come into your head. The name is there since you have met (5) person and his name. It (6) has to be dug out. The initial effort to recall (7) the mind for operation, but it is the subconscious (8) that go to work to dig up a (9) memory. Forcing yourself to recall (10) never helps because it doesn’t (11) your memory；it only tightens it. Students find the preparatory method help (12) examinations. They read over the questions (13) trying to answer any of them. (14) they answer first the ones (15) which they are most confident. Meanwhile, deeper mental activities in the subconscious mind are taking (16) ; work is being done on the (17) difficult questions. By the time the easier questions are answered, answers (18) the more difficult ones will usually begin to (19) into consciousness. It is often (20) a question of waiting for recall to come to the memory.

15（）

A.of

B.with

C.for

D.in