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【简答题】
Identify each of the following compounds. a. A gas with a sweetish odor that promotes the ripening of green fruit. b. An unsaturated compound of the formula C7H8 that gives a negative test with bromine in carbon tetrachloride. c. A compound with an ammonia-like odor that acts as a base; its molecular formula is CH5N. d. An alcohol used as a starting material for the manufacture of formaldehyde.
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举一反三
【简答题】From
19 to 1658 England was called a Commonwealth. It was ruled first by Oliver
Cromwell as _______.A. Lord Protector B. Lieutenant General C. Commander of the New Model Army D. President
【单选题】From 1649 to 1658 England was called a Commonwealth. It was ruled by Oliver Cromwell as ______
A.
Lord Protector
B.
Lieutenant General
C.
Commander of the New Model Army
D.
President
【单选题】Demeter is believed to bring mankind harvest and _______.
A.
happiness
B.
love
C.
crops
D.
foods
【简答题】通读下面短文，掌握其大意，然后从短文后面的括号内选出可以填入短文空格处的词。 Peter is a famous writer now. But he was not a 1______ student when he was young. He was often late for 2______ and didn't like doing his homework. Sometimes, he...
【单选题】From 1649 to 1658 English was called a Commonwealth. It was ruled first by Oliver Cromwell as______.
A.
President
B.
Lord Protector
C.
Lieutenant General
D.
Commander of the New Model Army
【简答题】词汇 根据句意或提示,写出单词,完成句子。 1. The birthday present he sent me is very (有价值)． 2. Millie had no (选择)but to wait for the next trai n yesterday morning． 3. The little boy always (拒绝)to do so much homework eve...
【单选题】Demeter’s daughter Persephone was kidnapped by ______.
A.
Hades
B.
Zeus
C.
Poseidon
D.
Ares
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