借贷记账法下的余额平衡是由( )决定的。A．借贷记账法的记账规则 B．会计恒等式

下列各项的判断与分析，正确的一项是(    )（2分）

A．“悠闲”、“寒噤”、“和平”、“勤劳”都属于形容词。

B．“黄发垂髫，并怡然自乐”这句运用了借代的修辞手法。

C．“天看到星星也像浸在水里，而且要滴落下来的样子”这句运用了比喻修辞手法，形象地写出了水的晶莹清澈和白洋淀自然环境的优美。

D．“我们欧洲人是文明人，中国人在我们眼中是野蛮人。这就是文明对野蛮所干的事情”，这句运用讽刺的修辞手法，突出了欧洲强盗的野蛮行径。

在“研究匀变速直线运动”实验中，交流电频率为50HZ，某同学打出如图所示的纸带，相邻两计数点之间有4个点未画出，并测得OA=2.80cm，DE=9.10cm，则小车的加速度为______m/s²，（结果取2位有效数字）

患者，男，34岁，从三楼跌落10天入院。查体：神清，MMT检查髂腰肌肌力右侧5级，左侧4级，股四头肌肌力右侧4级，左侧3级，胫前肌肌力右侧2级，左侧1级，趾长伸肌肌力双侧0级。肛门括约肌无张力。感觉检查全部正常。

以上检查，可定位患者脊髓损伤平面在于（）。

A.L2

B.L3

C.L4

D.L5

E.S1

Imagine fishermen walking down to the seashore, ready to carry out their early morning routine of preparing their boats and net. (51) they hope for a good catch of fish. But to their (52) , a horrible sight meets their still sleepy eyes. Thousands of fish have been washed ashore dead. The cause of this mass destruction—A red tide!

Red tides are a global (53) . They have been observed on both the Atlantic and the Pacific coasts of the United States and Canada. They have also occurred in many other places. Though relatively few people are (54) them, red tides are not new.

In the Philippines, a red tide was first seen in the province of Bataan in 1908. Since then, red tides have been seen in many other (55) . A Philippines red tide expert told us that " (56) the fish kills, the Philippines has documented 1, 926 eases of dead shellfish poisoning caused by red tides. "

The term "red tide" (57) the discoloration of water that sometimes occurs in certain areas of the ocean or sea. Although the color is often red, it may also be (58) of brown or yellow. The World Book Encyclopedia reports that "the discolored areas may range from (59) a few square yards to more than 2,600 square kilometers. "

What causes such discoloration Red tides are generally caused by several species of single-celled organisms. These tiny organisms have hair-like projections which they use to (60) themselves in water.

60().

A.propel 

B.probe 

C.proceed 

D.prompt

下图中（）是电动机单向直接启动控制线路电气原理图。

A.A

B.B

C.C

D.D