系统性红斑狼疮血清补体的特点是()
A.总补体下降
B.血清补体C5下降
C.血清补体已下降
D.补体Clq降低
E.血清补体C3下降
参考答案:A, C, E
—Can you give me a hand, Robin?
—But, Helen, you ____ my help every five minutes. I ___ TV now. [ ]
A. need, am watching
B. need, watch
C. are needing, watch
D. are needing, am watching
影响智力发展的因素是什么