最容易引起严重的缺血性贫血的寄生虫是
A．蛲虫
B．钩虫
C．血吸虫
D．肺吸虫
E．鞭虫
参考答案：B
－I can’t believe that you _______ that old trick.
－Yes, I was stupid enough.
A．dealt with
B．fell for
C．took in
D．came across
下列燃料中最理想的是（ ）
A．天然气
B．煤
C．氢气
D．乙醇气油
