甲型肝炎的潜伏期为()。
A.3~5周
B.2~4周
C.3~8周
D.4~6周
E.2~6周
参考答案:E
解析:甲型肝炎的潜伏期为2~6周,平均4周。
There is much chance _____ Bill will recover from his injury in time for the race. [ ]
A. that
B. which
C. until
D. if
下列程序的执行结果是( )。 a=75 If a>90 Then i=4 If a>80 Then i=3 If a>70 Then i=2 1f a>60 Then i=1 Print "i=";i
A.i=1
B.i=2
C.i=3
D.i=4