词汇与结构
Each ILS antenna ____ a narrow beam, one slightly to the left of the runway centerline, the other to the right.
Each ILS antenna ____ a narrow beam, one slightly to the left of the runway centerline, the other to the right.
举一反三
- When the left falling stroke and right falling stroke ______ each other, first write the left falling then the right falling stroke. A: cross or join B: enclose C: contain D: consist of
- 函数$z=\arcsin\dfrac{1}{~\sqrt{x+y}~}$的定义域为( ) A: $\left\{(x,y)\left|~x+y\geq<br/>0\right.\right\}$; B: $\left\{(x,y)\left|~x+y\geq<br/>1~\text{或}~x+y\leq<br/>-1 \right.\right\}$; C: $\left\{(x,y)\left|~x+y\geq<br/>1\right.\right\}$; D: $\left\{(x,y)\left|~x+y\geq<br/>\dfrac{4}{~\pi^2~}\right.\right\}$．
- \(\left\{ {\left( {x,y} \right)\left| {2 \le {x^2} + {y^2} \le 4} \right.} \right\}\)是闭区域.
- They compete____ . A: against one another B: the one against the other C: each against the other D: against each one
- People should love ________. A: each other B: the other each C: another one D: one another