执勤舰艇舰艇长应当具备（）资格。
A、全训合格
B、独立操纵合格
C、独立值更
D、以上都对
参考答案：B
一次出血不引起全身症状提示出血量小于（）
A.5mL
B.50mL
C.400mL
D.1000mL
E.800mL
In English letters, the date is put ______.
A. at the top right corner B. below the receiver’s addressC. at the upper left corner D. above the signature
