A.an official of a research foundation who identifies research projects for potential funding
B.a state official whose position requires her to alert farmers about possible innovations in farming
C.a researcher whose job is to identify potentially profitable areas for research and product development
D.a botanist conducting experiments to determine the relationship between degree of mycorrhizal infection and expected uptake of phosphate
第1题
一般情况下,容积式泵在铭牌上不标注:
A.额定排出压力
B.额定扬程
C.额定转速
D.额定流量
第6题
A.泵的额定流量减半、而额定扬程不减半
B.泵的额定流量不减半、而额定扬程不减半
C.泵的额定流量减半、而额定扬程减半
D.泵的额定流量不减半、而额定扬程减半
第7题
A.泵的额定流量减半、而额定扬程不减半
B.泵的额定流量不减半、而额定扬程不减半
C.泵的额定流量减半、而额定扬程减半
D.泵的额定流量不减半、而额定扬程减半
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