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【单选题】
“海阔凭鱼跃，天高任鸟飞”．下列属于鱼类适于水中生活特征的是（ ） ①一般身体背面呈深灰色、腹面呈白色，使其在水中不易被敌害发现 ②身体呈纺锤形，躯干部和尾部覆盖着鳞片，鳞片表面有黏液，减小游泳时的阻力 ③身体两侧各有一行侧线，它是一种特殊的感觉器官，有感知水流的方向、速度和测定方位的作用 ④呼吸器官是鳃 ⑤运动器官是鳍．A.
①②③④
B.
②③④⑤
C.
①③④⑤
D.
①②③④⑤
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【判断题】The proportion of families buying furniture, household goods and cars by hire purchase is higher in the UK than in the USA.
A.
正确
B.
错误
【单选题】Which of the following do not belong to household goods?
A.
refrigerator
B.
pillow
C.
pan
D.
photocopier
【简答题】正四棱锥 中, ,则它的体积为 ____.
【单选题】A great deal of the knowledge we have about household goods【C1】______ largely from the advertisements we read. Advertisements introduce us to new products or remind us of the existence of ones we alre...
A.
obtains
B.
requires
C.
gains
D.
derives
【单选题】The household goods __________ of great concern to the family with a new house.
A.
are
B.
is
C.
has been
D.
had been
【简答题】正四棱锥 中, ,则它的体积为 .
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