单项选择题Many of the electric and electronic products we purchase and consume today are what some industrial experts call " homogeneous toys".

A.identical
B.homosexual
C.unrelated
D.distinguishable


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3.单项选择题As always when she sang in the bathroom, she________the high notes in a special way.

A.span out
B.belted out
C.spread out
D.stretch out

4.单项选择题Annie Jump Cannon, ________ discovered so many stars that she was called "the census taker of the sky".

A.a leading astronomer,
B.who, as a leading astronomer,
C.was a leading astronomer,
D.a leading astronomer who

5.单项选择题It was too late to________of the contract.

A.back out
B.back down
C.back up
D.back away

6.单项选择题I wouldn''t trust such a________person.

A.deceitful
B.deceptive
C.decisive
D.deceive

9.单项选择题The Kyoto Protocol has been designed to ________the global environmental problems.

A.dress
B.address
C.stress
D.distress

10.单项选择题The jury gave a________of "not guilty".

A.sentence
B.judgement
C.charge
D.verdict