高速钢刀具刃部能保持高硬度的最高工作温度是（）。 A.250～300℃ B.350～

Complete the sentences with the given words in their proper forms (用括号中所给单词的适当形式完成下列句子。每空格限填一词) (共8分)

小题1:The prices of many__________ usually go up during festivals．(flower)

小题2:This is the__________ time for our school to hold the robot-making contest．(six)

小题3:I could hardly believe she had made a video about water pollution by__________．(her)

小题4:The company hopes its new product will be__________ on the European market．(success)

小题5:Larry has put on too much weight because of his__________ diet．(healthy)

小题6:Jack finds it difficult to pronounce some English words__________．(correct)

小题7:Don’t use the lift when you escape from a high__________ during a fire．(builD.

小题8:It is not wise of young people to__________ their jobs from time to time．(changeable)

—It's 10 o'clock now. I must go.

—It's raining heavily outside. Don't leave ______ it stops. [ ]

A. since

B. until

C. when

D. because

大剂量糖皮质激素突击治疗用于

A．肾病综合征
B．霉菌性口炎
C．肾上腺皮质次全切除后
D．慢性肾炎
E．中毒性菌痢

英、红、燕三个人讨论一数学题，当她们都把自己的解法说出来以后，英说：“我做错了。”红说：“英作对了。”燕说：“我做错了。”老师看过她们的答案并听了她们的上述意见后说：“你们三个人有一个做对了，有一个说对了”。
　　那么，谁做对了呢( )。

A．红

B．英

C．燕

D．不能确定

将一盏电灯放在桌子上代表太阳，在电灯旁放置一个地球仪代表地球，拨动地球仪模拟地球运动。读图回答下列小题。

图示时间内，P地（）

A.盛行东北信风

B.正午太阳高度达全年最大值

C.当地时间6时日出

D.此日过后白昼逐日变长