工程成本控制的主要对象是主要费用的()A.变动费用 B.固定费用 C.材料费用 D.

中性点直接接地系统，电压互感器剩余电压二次绕组额定电压应为（）。

A．100V

B．100/3V

C．100/V

D．100/V

属于良性卵巢肿瘤的是（）

A.库肯勃瘤

B.内胚窦瘤

C.颗粒细胞瘤

D.无性细胞瘤

E.卵泡膜细胞瘤

.

Thirteen-year-old Shanna Wilkinson saved the life of Holly, a sheepdog, who was very young. Holly was a tiny and very weak dog. According to the vet, there was little chance that Holly could survive. But with Shanna’s love and care, Holly grew into a strong, healthy adult dog with a special skill that would save Shanna’s life more than once.

At seventeen, Shanna got a kind of illness. She began having seizures(疾病发作) repeatedly, often as many as nine times a day. Because she couldn’t predict when the seizures would occur, every moment was dangerous for her. Every day she was in danger--- it was risky for her to simply cross the street, much less drive a car.

Just when it seemed as if Shanna would have to live indoors forever, her mother noticed something strange happened. Several times a day, the dog would begin whimpering(呜咽) and pulling Shanna’s leg. At first, no one was sure what was wrong with her. But they soon realized that Holly’s strange behavior always occurred before one of Shanna’s seizures began. Amazingly, Holly is able to predict exactly when the seizures will occur, even though Shanna herself never sees them coming.

Luckily, no matter how mysterious the dog’s talent is, Holly’s help has made life a billion times better for her owner.

“I feel comfortable and safe going out in public, and I can know when my seizures will come because of Holly, ” Shanna says. “Holly has really given me back my independence and I can live a normal life.”

68. What do we learn about the dog Holly?

A. She can get recovered herself.

B. She is larger than most dogs.

C. She would have died without Shanna’s care.

D. She was fed well when Shanna saved her.

69. It was impossible for Shanna to driver a car because ___ .

A. she was too young to drive

B. she had no sense of direction

C. her seizures would come suddenly

D. she didn’t know the traffic rules

70. According to the passage, how does Holly help Shanna?

A. She can make Shanna know when the seizures come.

B. She can help Shanna by sending for a doctor.

C. She can stop Shanna from going out in public.

D. She can help Shanna when she gets injured.

71. The underlined word “them” in the third paragraph probably refers to ___ .

A. Shanna’s family                   B. Holly’s behaviors

C. Shanna’s actions                   D. Shanna’s seizures

可促进肠内钙吸收的是（）

A.膳食纤维

B.未被消化的脂肪酸

C.植酸

D.草酸

E.乳糖

合理选择饮食、正确使用药物等是保证身体健康的重要方面。

(1)有广告称某品牌的糕点只含面粉、油脂、蛋白质，不含糖，是糖尿病人的最佳食品，这种说法____（填“正确”或“不正确”）。氨基酸是蛋白质的基石，其分子中一定含有的官能团是氨基和____基。

(2)下列药物：抗酸药、青霉素、阿司匹林中，属于解热镇痛的药物是____；属于抗生素的是___。含

Mg(OH)₂的药物治疗胃酸（含盐酸）过多的原理是___ （用化学方程式表示）。维生素C的分子式为___；由于维生素C具有____（填“氧化性”或“还原性”），可将Fe³⁺转化成Fe²⁺，所以服用维生素C有利于 铁元素的吸收。