It is implied in the passage that_________．
A. governments and companies hadDifferent opinions about the safety of products
B. governments paid little attention to the safety of products
C. government officials oftenDid not listen to scientists
D. in the past no safety laws were introduced by governments
查看答案
A.unitB.struckC.underD.truck
A. unit
B. struck
C. under
D. truck
在区间(0，+∞)内是单调增函数的是（） (A)y=3+x3 (B)y=3-x2 (C)y=8-x4 (D)y=-8x+1
（）
A. 1earners
B. programs
C. users
D. tools
If only_________the violin in the middle of the night，she'd be an ideal guest．
A. didn’t play
B. wouldn't pIay
C. played
D. would play
微信支付 
支付宝支付