全世界小麦产量最多国家的是（）。

第二节语法填空 (共20小题，满分30分)

阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空，并将答案填写在答题卡标号为26～45的相应位置上。

A

Nobody before Jane fully understood chimp ____26_____(behave). She spent years observing and recording their daily activities. Since her childhood she ____27____(want) to work with animals in their own environment. ____28______, this was not easy. When she first arrived in Gombe in 1960, ___29____ was unusual for a woman to live in the forest. Only ____30______ her mother came to help her for the first few months was she allowed to begin her project. Her work changed the way people think _____31_____ chimps. For example, one important thing she discovered was that chimps hunt and eat meat. Until then everyone had thought chimps ate only fruit and nuts.She _____32___(act) observed chimps as a group ____33____ (hunt) a monkey and then eating it. She also discovered ____34____ chimps communicate with each other, and her study of their body language helped her work ___35___ their social system.

以太网100BASE-TX标准规定的传输介质是( )。

A．3类UTP

B．5类UTP

C．单模光纤

D．多模光纤

在已创建的Movies表中有一Date Released字段，数掘类型为“数字”。在向表中输入数据时可能会在这个字段中把1985输入为1895，而Access将接受它。为了避免这类数据输入的错误，希望这个字段中的值位于1900和2050之间，可以在“有效性规则”编辑框中输入表达式( )。

A．＞1900＜2050

B．＜2050＞1900

C．＞1900 And＜2050

D．＞1900 or＜2050

下列关于Na₂O₂的说法正确的是（    ）

A．SO₂和CO₂都是酸性氧化物，SO₂与Na₂O₂反应生成Na₂SO₃和O₂

B．84 g NaHCO₃受热分解，将生成的气体通过足量的Na₂O₂，固体质量增加31 g

C．将Na₂O₂投入到酚酞试液中，溶液变红

D．Na₂O₂与水的反应中，Na₂O₂既是氧化剂，又是还原剂

在区间停车再开车时，司机必须检查试验列车制动主管的（）状态，确认列车完整，具备开车条件后，方可起动列车。