车辆进入高速公路后，应该在（）道行驶。

从方框中选适当的选项补全对话。

A：Hi, Tom. You look so worried. 小题1:

B：We are going to have a basketball game against Class Two. But Jack fell    ill. He can’t take part in it.

A：I am sorry to hear that.

B：David,   小题2:

A：Sure. What is it?

B：小题3:

A：I’d be glad to. But I’m not good at playing basketball.

B：Never mind. I’m sure you can do it well.

A：I will do my best.  小题4:

B：Of course not.  小题5:

A：OK. Thank you very much. See you later.

B：See you.

冠心病心肌梗死患者的超声心动图表现为（）。

A.节段性室壁运动异常

B.弥漫性室壁运动异常

C.心肌的局限性肥厚

D.二尖瓣曲线呈城墙样改变

E.左心室对称性肥厚

支链氨基酸主要在哪个组织代谢（）。

A.脑

B.肾脏

C.肝脏

D.骨骼肌

E.脾脏

为了完整的反映一项经济业务的全貌，对于现金和银行存款之间相互划转的经济业务，既要填制付款凭证，又填制收款凭证。 ( )

神经调节的基本方式是反射．所以草履虫对食盐的躲避也是反射．______．