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问题 单项选择题

A320缓冲通气油箱被探测到油燃油进入，那么，是下来哪个部件输送信号给EEC将FRV（燃油回油活门）关闭？（）

A.FQIC（燃油量指示计算机）

B.FLSCU（油面感应控制组件）

C.油量传感器

D.油面传感器

答案

参考答案：B

单项选择题

Parasitic wasps lay their eggs directly into the eggs of various host insects in exactly the right numbers for any suitable size of host egg. If they laid too many eggs in a host egg, the developing wasp larvae would compete with each other to the death for nutrients and space. If too few eggs were laid, portions of the host egg would decay, killing the wasp larvae. Which of the following conclusions can properly be drawn from the information above

A．The size of the smallest host egg that a wasp could theoretically parasitize can be determined from the wasp’s egg-laying behavior.

B．Host insects lack any effective defenses against the form of predation practiced by parasitic wasps.

C．Parasitic wasps learn from experience how many eggs to lay into the eggs of different host species.

D．Failure to lay enough eggs would lead to the death of the developing wasp larvae more quickly than would laying too many eggs.

E．(E) Parasitic wasps use visual clues to calculate the size of host egg.
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单项选择题

患者，女性，32岁，自诉“胆小怕痛”曾有“晕针史”，检查见右下颌第二前磨牙残根，根尖瘘管挤压无脓，治疗设计为局麻下拔除，麻醉顺利，10min后测试麻醉效果良好，开始操作，术中患者感觉疼痛但可耐受，其后自诉头晕、胸闷、心慌、恶心，检查患者面色苍白，四肢冷而无力，脉快而弱

关于造成上述症状的病因中错误的是

A．过敏体质

B．疼痛

C．恐惧

D．体位不良

E．饥饿
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