在骨骼肌收缩过程中，能与细肌丝结合的是 ()A．Na＋ B．K＋ C．Ca2＋

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文,文中共有l0处语言错误，每句中最多有两处．每处错误仅涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号（√)，并在其下面写出该加的词。

删除：把多余的词用斜线(／)划掉．

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1．每处错误及其修改均仅限一词；

2．只允许修改l0处，多者(从第11处起)不计分．

(试题内容见答题卡)

In early January this year, the rate of UFO reports were steady,around three per

weeks. When, however, on Monday, January 16, a science fiction film about visitors to outer space was shown on television,there was the immediate increase in reports of sightings from all parts of the States. The commanding officer,Wayne Tyler,who (is) directly responsible for the study all such repsorts,decided to making his findings known. They wrote an article,which said that all UFO reports could be explained for quite naturally by aircraft movements. Follow this explanation,there was a rapid drop in the number of reported sightings,because the rate remainded above the previous level.

注：文章红色部分为需要修改的地方！

是比喻句的在括号里打“√”，不是的打“×”。

 白杨树像卫士一样挺立在路旁。 (      )

有的狮子低着头，好像专心听桥下的流水声。(      ) 

这比山还高比海还深的情谊，我们怎么能忘怀？(      ) 

平静的湖面像一面镜子。(      ) 

天上的星星眨着眼睛。(      )

有一个正方体的底面周长与一个圆柱体底面周长相等，它高也相等，那么它们的体积也必定相等．______．（判断对错）

有关睡行症描述错误的一项是

A．做些无目的的动作

B．入睡后2～3小时内从床上坐起

C．目光呆滞

D．事后记忆忧新

E．发作时很难唤醒

办公区、生活区设臵时宜避开（）等区域。

A.粉尘

B.烟雾

C.噪声

D.弃土场

E.对人体有害物质