胁下逆抢心
参考答案:
指胁下气逆,上冲心胸。
She studies very hard, because she doesn't want to ______ her parents ______.[ ]
A. let; up
B. let; down
C. make; up
D. stay; up
模具成型中,内模成型时,面剂的大小要适当,否则影响产品质量。( )