某同学用放大5倍目镜与10倍物镜组合观察到了一只清晰的草履虫，这时显微镜的放大倍

Every time he meets with hard problems, he always ________ his parents.[      ]

A. conduct  

B. connect

C. combine  

D. consult

以下皮肤病中不会出现丘疹皮损的是（）

A.银屑病

B.色素痣

C.花斑癣

D.皮肤淀粉样变

在优化财政支出结构的过程中，财政支持与社会参与的关系是（）。

A.要完全依靠财政发挥其职能作用

B.主要依靠调动社会各方面的参与

C.既要充分发挥财政职能作用，也要积极调动社会各方面参与的积极性

D.主要通过市场满足的社会需求

In a public-key cryptosystem, (71) encrypted with the public key can only be deciphered with the private key from the same (72) . Conversely, (71) encrypted with the private key can be decrypted only with the public key. Users can make their public keys (73) available or place them at a key distribution center or others to access. However, the private key must be (74) safe. In public-key systems there’s no (75) to find a safe channel for communicating a shared secret key.

A. keepB. keeped C. keeping D. kept

炮黄料