Outside
our office window, there is a fire ______ on the right.
A: ladder
B: escape
C: steps
D: stairs
our office window, there is a fire ______ on the right.
A: ladder
B: escape
C: steps
D: stairs
举一反三
- 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: $\left\{(x,y)\left|~x+y\geq<br/>\dfrac{4}{~\pi^2~}\right.\right\}$．
- outside the office
- 立即灭火并将2号货舱附近冷却。（） A: APut out the fire right now and cool hold No.2. B: BPut off the fire right now and cool around No.2. C: CPut on the fire right now and cool hold No.2. D: DPut out the fire right away and cool around hold No.2.
- Our factory has_________. A: many fire equipments B: much equipment of fire C: many equipments of fire D: much fire equipment
- In China, people should go up and down the stairs ( ) when not in emergency. A: on the left in a line B: on the right in a line C: on the left in parallel D: on the right in parallel