—What do you think of Beijing Opera?
| A．I’d love to | B．I think so |
| C．I can’t stand it | D．So do I |
—What’s your speech , Dr．Smith ?
—Tomorrow you will get it．
—Tomorrow you will get it．
| A．by | B．of | C．from | D．on |
—People find it hard to get across the river．
—I think at least two bridges over it．
—I think at least two bridges over it．
| A．need | B．are needing | C．will need | D．should be needed |
—Where is my little dog?
—It the back of the house．
—It the back of the house．
| A．has gone to | B．had gone to | C．has been to | D．had been to |
—My brother and I will go to the library tomorrow.
— . Shall we go together?
— . Shall we go together?
| A．So I do | B．So do I | C．So will I | D．So I will |
下列关于肽键的描述，正确的是
0 22354 22362 22368 22372 22378 22380 22384 22390 22392 22398 22404 22408 22410 22414 22420 22422 22428 22432 22434 22438 22440 22444 22446 22448 22449 22450 22452 22453 22454 22456 22458 22462 22464 22468 22470 22474 22480 22482 22488 22492 22494 22498 22504 22510 22512 22518 22522 22524 22530 22534 22540 22548 159627
| A．在缩合过程中所形成的肽键数一定等于所失去的水分子数 |
| B．肽键可以表示为CO—NH或NH—CO |
| C．几条肽链在形成蛋白质的过程中也通过肽键连接起来 |
| D．在链状肽中一个十肽分子比一个八肽分子多一个肽键 |