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【单选题】
环境卫生学的研究对象是A.
自然环境、生活环境和社会环境
B.
人群健康
C.
生物地球化学性疾病
D.
人类健康及其周围环境
E.
环境污染的综合治理
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举一反三
【简答题】Ifyou had wanted to buy a record, what ?A. wouldyou buyB. hadyou boughtC. wouldyou have boughtD. ouldyou be buying
【单选题】She ________ a model before she _______ a superstar.
A.
have been, became
B.
had been, become
C.
had been, became
D.
has been, become
【单选题】_______, everything would have been all right.
A.
He had been there
B.
There he had been
C.
Been there he had
D.
Had he been there
【单选题】I had thought that he ___ for a least twenty years.
A.
had been dying
B.
had died
C.
had been dead
D.
died
【单选题】Xiao Pei said she ______ Hainan for 3 months.
A.
has been in
B.
had been in
C.
had been to
D.
had gone to
【单选题】Ifyou had been willing to pay $2.19for the gallon of milk purchased at thesupermarket but were required to payonly $1.89, you have gained
A.
a refund of $.30 from the clerk
B.
a consumer surplus amounting to$.30.
C.
excess marginal benefit of $2.19.
D.
producer surplus of $.30.
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