IP板在第一次激发后多久读出最好
A. 6h
B. 8h
C. 10h
D. 12h
E. 14h
螺旋扫描中，会造成漏扫的螺距值是
A. pitch=1
B. pitch=0.5
C. pitch=1.5
D. pitch=0.8
E. pitch=0.7
The chair looks rather hard, but in fact it is very comfortable to _______.
A. sit
B. sit on
C. be sit
D. be sat on
I’m hungry. Get me something _________.
A. eat
B. to eat
C. eating
D. for eating
微信支付 
支付宝支付