并殖吸虫的感染致病对象是
A．人B．家畜C．野生动物D．啮齿动物E．人和某些家畜、野兽
参考答案：E
凿岩机上的储能器应充（）气，压力应达到110bar才能正常工作。
Of all the four dictionaries, which do you think is _____? [ ]
A. most useful
B. the more useful
C. more useful
D. the most useful
