[单项选择]

There are exceptions to the rule of male insects being smaller than the females, and some of these exceptions are intelligible. Size and strength would be an advantage to the males which fight for the possession of the females, and in these cases, as with the stag-beetle (Lucanus), the males are larger than the females. There are, however, other beetles which are not known to fight together, of which the males exceed the females in size, and the meaning of this fact is not known, but in some of these cases, as with the huge Dynastes and Megasoma, we can at least see that there would be no necessity for the males to be smaller than the females, in order to be matured before them, for these beetles are not short-lived, and there would be ample time for the pairing of the sexes.

Where male beetles are smaller than female beetles, it
A. they have to fight for their mates
B. they are more intelligent
C. they are ephemeral creatures
D. there is ample time for mating

[简答题]frog因为人类失去habitat insects

[单项选择]The golden rule for good writing is not a rule of grammar. It is true that there are rules of grammar, as in music there are rules of harmony, and that they are important, but one can no more write good English merely by keeping these rules than one can compose good music. The golden rule for good writing concerns not merely the arrangement of words but the choice of them. Only the right words can convey the right meaning: the secret is to pick those words and to use them and them only. For the "right" words have a happy knack (a clever way) of arranging themselves for you. But, first, you must have something to say. Matthew Arnold once said: "Have something to say and say it as clearly as you can. That is the only secret of style." There is much truth in those words, especially in relation to the sort of writing where emotional appeal plays no part. We can turn to the member of the General Post Office who, by composing the notice "Postal officials are neither bound to give change nor
A. can expect to be turned away if he offers a pound for a shilling telegram
B. can give an official a ten pound note for one pound stamps and expect change
C. will be given change if it is convenient
D. with insufficient money to pay for what he wants may expect to be given credit