我国某区域四季各级平均降水量（mm ）数据如下表。据此回答1 ～2题。

1．该区域最可能位于我国的 [     ]

A．华北平原      

B．内蒙古高原      

C．珠江三角洲      

D．长江三角洲

2．关于该区域降水量的影响，叙述正确的是 [     ]

A．在冬季易引发旱灾            

B．在春季易引发水土流失

C．在夏季易引发涝灾            

D．在秋季易引发泥石流

Although spinach is rich in calcium, it also contains large amounts of oxalic acid, a substance that greatly impedes calcium absorption by the body. Therefore, other calcium-containing foods must be eaten either instead of or in addition to spinach if a person is to be sure of getting enough calcium. Which of the following, if true, most seriously weakens the argument above

A．Rice, which does not contain calcium, counteracts the effects of oxalic acid on calcium absorption.

B．Dairy products, which contain even more calcium than spinach does, are often eaten by people who eat spinach on a regular basis.

C．Neither the calcium nor the oxalic acid in spinach is destroyed when spinach is cooked.

D．Many leafy green vegetables other than spinach that are rich in calcium also contain high concentrations of oxalic acid.

E．(E) Oxalic acid has little effect on the body’s ability to absorb nutrients other than calcium.