粘贴造口袋时,尽量避开()、()或皱褶处。
参考答案:皮肤凹陷;瘢痕
she works hard ______ English and she does well ______ it. [ ]
A. at, in
B. in, at
C. with, in
D. in , in
馈线的接地线要求顺着馈线的什么方向进行接地,允许什么走线。()
A、下行,向上
B、上行,向上
C、下行,向下
D、上行,向下