问题
不定项选择题
在一定条件下，下列可逆反应达到化学平衡H2(g)+ I2(g)
2HI(g)△H >0，要使混合气体的紫色加深，可以采取的方法是 [ ]
A．降温、减压
B．降温、加压
C．升温、加压
D．升温、减压
答案
答案：B
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在一定条件下，下列可逆反应达到化学平衡H2(g)+ I2(g)2HI(g)△H >0，要使混合气体的紫色加深，可以采取的方法是 [ ]
A．降温、减压
B．降温、加压
C．升温、加压
D．升温、减压
答案：B
| 阅读理解 | |||||||||||||||
Mr Cool's Clothes Store
| |||||||||||||||
| 1. A pair of(一双)socks is __________. | |||||||||||||||
| A. $4 B. $80 C. $20 | |||||||||||||||
| 2. __________ are blue. | |||||||||||||||
| A. The socks and the skirt B. The skirt and the sweater C. The socks and pants | |||||||||||||||
| 3. The clothes for $20 are __________. | |||||||||||||||
| A. blue B. red C. green | |||||||||||||||
| 4. You can buy a pair of pants for __________ at Mr Cool's Clothes Store. | |||||||||||||||
| A. $26 B.￥80 C. $80 | |||||||||||||||
| 5. Mary has $100. She can buy __________. | |||||||||||||||
| A. a pair of pants and a skirt B. a skirt and a sweater C. four pairs of pants and a sweater |