问题
选择题
The water in the ocean also keeps the temperature of the earth steady by absorbing and _____heat.
A．giving away
B．giving up
C．giving back
D．giving off
答案
答案：D
搜题请搜索小程序“爱下问搜题”
The water in the ocean also keeps the temperature of the earth steady by absorbing and _____heat.
A．giving away
B．giving up
C．giving back
D．giving off
答案：D
下列四个图象能正确反映其对应实验操作的是
 |  |  |  |
| A．加热一定质量的碳酸氢钠 | B．用等质量、等质量分数的双 氧水制取氧气 | C．向一定体积的稀盐酸中逐滴加入氢氧化钠溶液 | D．某温度 ，向一定量饱和硝酸钾溶液中加人硝酸钾晶体 |