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【多选题】
设 确定z为关于x,y的函数,求 。 则下列说法正确的有 ( )A.
先化方程得zlnz-zlny-x=0，方程两边同时对x求导，最后得
B.
先化方程得zlnz-zlny-x=0，方程两边同时对y求导，最后得
C.
令F(x,y,z)= ，利用公式可直接得
D.
令F(x,y,z)= ，利用公式可直接得
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【单选题】He was eager to go to the hospital to see his stepmother,______ he loved and respected as his own mother.
A.
as
B.
which
C.
/
D.
whom
【单选题】The State banks are not enterprises in a real ( ) and are close to being government institutions.这些国有银行并非真正意义上的企业，而接近于是政府机构。
A.
sense
B.
science
C.
sensitive
D.
sensibility
【单选题】Which of the following can be learned from the passage?
A.
The Hope Foundation couldn’t help the woman.
B.
The police are determined to find the mother.
C.
The mother gave up her baby because she was homeless.
D.
The mother was eager to hide her identity.
【单选题】具有下列()情形的,应当由所在地旅游主管部门给予撤销导游证。
A.
导游死亡的
B.
取得导游证后出现无民事行为能力或者限制行为能力
C.
申请人以欺骗.贿赂等不正当手段取得导游证
D.
导游证有效期届满未申请换发导游证的
【单选题】(单项选择题)具有下列()情形的,应当由所在地旅游主管部门给予撤销导游证。
A.
导游死亡的
B.
取得导游证后出现无民事行为能力或者限制行为能力
C.
申请人以欺骗、贿赂等不正当手段取得导游证的
D.
导游证有效期届满未申请换发导游证的
【单选题】It's strange that he should refuse a job in government ______ a university appointment.
A.
in favor of
B.
at an advantage of
C.
in charge of
D.
in excess of
【单选题】In Kaus' opinion______.
A.
the government should strive to realize equality in everybody's income
B.
the government should do its best to bring every American into the middle class
C.
the goal will be easier to attain if we change it from money equality to civic equality
D.
It's almost impossible for the government to provide such things as national health care, improved public schools, universal national service, etc.
【单选题】He was eager to go to the hospital to see his stepmother, _____ he loved and respected as his own mother.
A.
as
B.
which
C.
who
D.
whom
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