门静脉高压症分流术的主要缺点是().
A.容易发生血栓
B.肝性脑病发生率高
C.手术复杂,不易推广
D.不能迅速纠正脾亢
E.肝功能易受损
参考答案:B
The 3G cellphone must be of great use to ________ wants to get the information through the Internet quickly. [ ]
A. who
B. whoever
C. whomever
D. whichever
如图所示水平杆AB=l,质量为2m,剪断绳BC瞬间,A处约束力为()。
A.2mg
B.mg
C.
D.