不属于肠道正常微生物群的类型是
A．嗜酸性类型
B．中间性类型
C．互生性类型
D．致病性类型
参考答案：A
(2013·福建，22)________ basic first－aid techniques will help you respond quickly to emergencies.
A．Known
B．Having known
C．Knowing
D．Being known
When the dancers stopped to us, we all couldn’t stop excitedly.
A．waving; to shout
B．to wave; shouting
C．to wave; to shout
D．to waving; shouting
