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问题 单项选择题

胚胎第5个月时主要造血器官是( )

A．卵黄囊
B．胆囊
C．淋巴管
D．肝脾
E．骨髓

答案

参考答案：D

解析：[解释点评] 胚胎第8周起至第5个月为肝脾造血期。(2004年考试真题)

选择题

--- Would you feel like _____ a cigarette?

--- Yes. I would like _____. But my doctor asked me not to do so.

A．having; so

B．having; to

C．to have; it

D．to have; to
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选择题

若代数式3x+1比代数式2x-1的值大1，则x的值是[ ]

A.2

B.-2

C.1

D.-1
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