某学校134名学生到公园租船，租一条大船需60元可乘坐6人；租一条小船需45元可

要使循环体至少执行一次，应使用（）循环。

A.For-next

B.While-wend

C.Do...Loopwhile|until

D.do[while|until]-loop

Can trees talk? Yes, but not in words. Scientists have reason to believe that trees do communicate (交际) with each other. Not long ago, researchers learned some surprising things. First a willow tree attacked in the woods by caterpillars (毛虫) changed the chemistry of its leaves and made them taste so terrible that they got tired of the leaves and stopped eating them. Then even more astonishing, the tree sent out a special smell---a signal (信号) causing its neighbors to change the chemistry of their own leaves and make them less tasty.

Communication, of course, doesn’t need to be in words. We can talk to each other by smiling, raising our shoulders and moving our hands. We know that birds and animals use a whole vocabulary of songs, sounds, and movements. Bees dance their signals, flying in certain patterns that tell other bees where to find nectar (花蜜) for honey. So why shouldn’t trees have ways of sending message?

小题1: It can be concluded from the passage that caterpillars do not feed on leaves that ______.

A．are lying on the ground

B．have an unpleasant taste

C．bees don’t like

D．have an unfamiliar shape小题2:According to the passage, the willow tree was able to communicate with other trees by ______.

A．waving its branches

B．giving off a special smell

C．dropping its leaves

D．changing the colour of its trunk小题3:According to this passage, bees communicate by ______.

A．making special movement

B．touching one another

C．smelling one another

D．making unusual sound

应用雷公藤制剂治疗类风湿性关节炎和强直性脊柱炎的适应证为（）

A.较长时间使用一线药物，疗效不满意的早、中期患者

B.长期使用皮质类固醇，已出现不良反应

C.肝肾功能不佳、心脏病、高血压、较重贫血、溃疡病不宜应用

D.青年男女应慎用或不用

E.以上都是

在现场计算电动机综合效率有困难的情况下也可用电动机输入功率(电流)与额定输入功率(电流)之比来判断电动机的工作状态，输入电流下降在( )以内属于允许使用范围。

A．10%
B．15%
C．25%
D．35%

农业保险，是指保险机构根据农业保险合同，对被保险人在（）生产中因保险标的遭受约定的自然灾害、意外事故、疫病、疾病等保险事故所造成的财产损失，承担赔偿保险金责任的保险活动。

A.种植业

B.林业

C.畜牧业

D.渔业