发球必须发在()发球区内
A. 同侧
B. 斜对角
C. 无所谓
D. 以上都不对
反手发网前球时,应采用()握拍
A. 随意
B. 正手
C. 反手
D. 苍蝇拍握法
His supervisor pushes and motivates him in such a positive manner that he is not only able to reach but to ______ his personal goals()
A. shrewd
B. stump
C. surpass
D. suppose
下列哪些因素会导致血液中淀粉酶减低()
A. 急性胰腺炎
B. 腮腺炎
C. 乙醇中毒
D. 慢性胰腺炎
E. 巨淀粉酶血症