关于卵巢的描述，正确的有（） A.分泌激素 B.排卵 C.皮质是其功能部分 D.位于

关于抑癌基因的叙述不正确的是( )

A．发生抗细胞增殖信号

B．与癌基因表达有关

C．缺失对细胞的增殖、分化有影响

D．存在于人类正常细胞

E．肿瘤细胞出现时才进行表达

— Do you know where David is? I couldn't find him anywhere.

— Well. He _____ have gone far-he told me he would come back in 5 minutes. [ ]

A. shouldn't

B. mustn't

C. can't

D. wouldn't

贯通测量工作完成后，应提交的资料有（）。

A.贯通测量设计书

B.贯通测量原始记录

C.贯通测量结果

D.贯通测量技术总结

E.贯通测量偏差调整值

Most antipsychotic medications exert which of the following effects on the central nervous system (CNS) （）

A. Stimulate the CNS by blocking postsynaptic dopamine, norepinephrine, and serotonin receptors.

B. Sedate the CNS by stimulating serotonin at the synaptic cleft.

C. Depress the CNS by blocking the postsynaptic transmission of dopamine, serotonin, and norepinephrine.

D. Depress the CNS by stimulating the release of acetylcholine.

分馏塔底温度过低，应生产要求提分馏塔底温度的手段有哪些？