题目内容

血窦分布于肾小球、胃肠粘膜、肝、脾等处。

A. 对
B. 错

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蒲肯野纤维与心室肌纤维相连,将冲动快速传递到心室各处,引发心室肌的同步收缩。

A. 对
B. 错

It was 300 miles______ to Liverpool.

A. by train
B. by car
C. by air

The youth hostel was in______.

A. an old house
B. an old warehouse
C. an old playground

______ was very helpful.

A. The stranger
B. The policeman
C. The man in the tourist information office