支配髂腰肌的神经主要是（）
A.L1～L2
B.L2～L4
C.S1～S3
D.L5～S1
E.T12～L1
参考答案：B
If you eat this kind of plant, you ____ very sick. [ ]
A. are
B. were
C. will be
D. have been
（）是指安全阀排放出口处的压力。
