狼、虎、狮都是食肉动物，它们的牙齿共有的特点是（）。 A．臼齿发达 B．门齿退化

It was many years ____ American women were given the rights to vote.

A．when

B．since

C．before

D．as

The business executive was deep in debt and could see no way out. Creditors (债主) were closing in on him. Suppliers were demanding payment. He sat on the park bench, head in hands, wondering if anything could save his company from bankruptcy (破产).

Suddenly an old man appeared before him. “I can see that something is troubling you.” he said. After listening to the executive, the old man said: “I believe I can help you.”

He asked the man his name, wrote out a check, and pushed it into his hand saying: “Take this money. Meet me here exactly one year from today, and you can pay me back at that time.” Then he turned and disappeared as quickly as he had come.

The business executive saw in his hand a check for $500,000, signed by John D. Rockefeller, then one of the richest men in the world!

“I can settle all my debts in a moment!” he realized. But instead, the executive decided to put the uncashed check in his safe, just knowing it would give him the strength to work out a way to save his business.

With renewed optimism, he made better deals and extended terms of payment. He closed several big deals. Within a few months, he was out of debt and making money once again.

Exactly one year later, he returned to the park with the uncashed check. At the agreed-upon time, the old man appeared. But just as the executive was about to hand back the check and share his success story, a nurse came running up and grabbed the old man.

“I’m so glad I caught him!” she cried. “I hope he hasn’t been bothering you. He’s always escaping from the rest home and telling people he’s John D. Rockefeller.” And she led the old man away by the arm.

小题1:What was the executive worried about?

A．He couldn’t produce enough for the suppliers.

B．The creditors wouldn’t lend him any money.

C．His products didn’t sell well.

D．He might run into bankcruptcy.小题2:Which of the following statements about the old man is TRUE?

A．The old man had known the executive was in trouble before he came.

B．The old man’s way of helping the executive worked out well.

C．The check he wrote was far from enough for the executive.

D．In fact the old man didn’t want to have his money back.小题3:The executive didn’t cash the check because ____________.

A. He was afraid that the bank didn’t have so much money.

B. The check gave him a lot of strength and encouragement.

C. He was uncertain if he could ever pay back the money.

D. He knew the old man wasn’t John D. Rockefeller at all.

宫内膜由增殖期转为分泌期，主要是哪种激素的作用（）

A.雌激素

B.孕激素

C.促卵泡素

D.促黄体素

E.促性腺激素释放激素

无肺门增大而只表现为肺门密度增高者（）

A.百日咳

B.麻疹肺炎

C.慢性支气管炎

D.中央型肺癌

E.心肺病变

在选择次级数据时应该注意什么？