蛋白质-热能营养不良小儿最先出现的症状是（）
A.身高低于正常
B.皮下脂肪消失
C.体重减轻
D.体重不增
E.肌张力低下
参考答案：D
用单词的适当形式补全句子。
1. Emily ______________ (have) a great time in Shanghai last year.
2. You ______________ (sleep) on the train at that time.
3. I ______________ (take) some pictures last week.
4. ______________ (does) he see his mother yesterday?
5. I ______________ (go) to the park with my parents last Saturday.
室内湿度达到_____时，可能产生显示器漏电。
A．90%
B．50%
C．40%
D．30%
