感性认识和理性认识的区别是A．感性认识包含错误，理性认识完全正确 B．感性认识反映事

一种商品七折销售，售价是原价的（    ）%。

用所给单词的正确形式填空。

1. ____________ (do) you ____________ (enjoy) yourself yesterday?

2. — ____________ (do) you ____________ (play) the violin yesterday?

    — No, I didn't. I ____________ (draw) some pictures.

3. I ____________ (eat) a big pizza yesterday.

4. There ____________ (be) many sheep on the farm last year.

5. I ____________ (watch) a cartoon on Saturday.

6. Her father ____________ (read) a newspaper last night.

7. We ____________ (go) to the zoo yesterday.

8. ____________ you ____________ (visit) your relatives last Spring Festival?

9. — ____________ he ____________ (fly) a kite on Sunday?

    — Yes, he ____________.

10. I'm ____________ (thin) than Yang Hua.

在点—点式网络中，一条通信线路只能连接一对结点，如果两个结点之间没有直接连接的线路，那么它们 ______。

A．不能通过中间结点转接

B．将无法通信

C．只能进行广播式通信

D．可以通过中间结点转接

静脉放血是真性红细胞增多症的治疗方式之一。（）

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