属于β受体阻滞剂的是( ) A．硝苯地平 B．消心痛 C．维拉帕米 D．普萘洛尔

George liked flying a plane. Once he bought a small plane and learned how to fly it. He soon became so good that he could make his plane do all kinds of tricks（技巧）.

George had a friend. His name was Peter. One day George said to his friend, “ Peter, would you like to have a trip in my plane?” Peter thought, “ I’ve traveled in a big plane several times, but I’ve never been in a small one, so I’ll go.”

They went up, and George flew around for half an hour and did all kinds of tricks.Peter said in a shaken voice（颤抖的声音）, “ Well, George, thank you very much for these two trips in your plane.”

George was very surprised and asked, “ Two trips? ”

“Yes, my first and my last.” Answered Peter.

小题1:Peter ______ his friend’s plane.

A．had to fly in

B．was asked (被邀请)to have a trip in

C．was asked to fly

D．asked George to fly小题2:Peter went up with George in the plane because ______ .

A．he liked traveling very much

B．George was good at flying his plane

C．he had never traveled in a small plane

D．Peter could do all kinds of flying tricks小题3:They were in the plane for ______ minutes.

A．forty-five

B．sixty

C．thirty

D．ninety小题4:How many times did Peter travel in his friend’s small plane?

A．Once

B．Twice

C．Three times

D．Several times小题5:From the passage we know that ______ .

A．Peter thanked George for the nice trip

B．Peter thought it was wonderful to have such a trip

C．Peter felt surprised that his friend could fly so well

D．Peter was worried about his safety while George was doing tricks in the sky

如图所示，一个验电器用金属网罩罩住，当网罩外加上水平向右、场强大小为E的匀强电场时，验电器的箔片         （填“张开”或“不张开”），我们把这种现象称之为            。此时，金属网罩的感应电荷在网罩内部空间会激发一个电场，它的场强大小为          ，方向为              。

总谐波畸变率用（）表示。

A.THD

B.TR

C.Ieq

D.VSC

患者，男性，64岁，头痛、呕吐3个月，1天前癫痫发作一次，发作后左侧肢体瘫痪，12小时后肌力恢复。既往体健。查体：神清，记忆力减退，双眼底视 * * 水肿，左侧偏身感觉障碍，左下肢病理征阳性。MRI：见右颞顶一形态不规则混杂信号境界不清病灶，周围脑组织水肿明显。增强扫描：肿瘤呈不均匀强化。

据上述临床资料，该病人的诊断应首先考虑为（）

A.转移瘤

B.低级别胶质瘤

C.高级别胶质瘤

D.脑脓肿

E.恶性淋巴瘤

严格执行国家发展改革委发布的《农村电网改造升级技术原则》和公司相关技术标准，全面推行公司（）

A、通用设计

B、新农村电气化村供电模式

C、小城镇供电模式

D、非通用设计