This river is so big that it is impossible to build a (?) under it without modern technology.
A.canal B.tunnel C.channel D.cable
这道题的答案是B,但不知为什么选B.
请会做的人帮忙讲解一下,谢谢 ~ !
參考答案:tunnel
n.[C]
1. 隧道,地道
The railroad passes under the mountain through a tunnel.
铁路穿过隧道从山下通过。
2. (矿场的)坑道,石巷
3. (动物的)洞穴
4. 地沟,涵洞
canal
n.[C]
1. 运河;河渠,水道;灌溉水渠
Coal used to be sent here by canal.
煤过去常经过运河送来。
2. (动植物体内的)管,道
3. 【天】(像水星表面上的)透过天文学望远镜看到的朦胧线条
channel
n.[C]
1. 水道,航道
The channel is marked by buoys.
航道由浮标标示。
2. 海峡
The English Channel separates France from England.
英吉利海峡将法国与英国分开。
3. 沟渠;河床
4. 途径;渠道;手段[P1]
You should go through the official channels if you want the government to help.
你应该通过正式渠道来争取政府的帮助。
5. 方向;路线;领域
6. 频道,波段
There are at present three television channels.
目前有三个电视频道。
7. 电路;通讯管道
cable
n.
1. 缆;索;钢索[C][U]
The truck used a cable to tow the car.
卡车用缆索拖曳汽车。
2. 电缆[C]
3. 越洋电报[C]
I received a cable from New York.
我收到一封从纽约来的电报。
4. 有线电视[U]
5. 锚链
根据题意只能选B
