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【简答题】
白血病是一种常见的造血组织肿瘤性疾病。该病是由于造血千细胞受到致癌因子的作用，不能正常地完成分化，而是变成了不受机体控制的、连续进行分裂的恶性增殖细胞。这种细胞在骨髓中堆积，使造血干细胞的分化增殖受阻。另据报道，近年来儿童中白血病患者人数有上升的趋势。而北京儿童医院的一份调查显示，最近就诊的白血病儿童患者中，90%的家庭过豪华装修。据上述资料回答下列问题： (1)这种变异的细胞我们称之为___________，其特点是____________。 (2)以家庭装修为例，试说明造血干细胞产生这种变异的诱因是____________(两例)。 (3)目前治疗白血病的较好方法是进行___________移植，移植使供者的___________与受者的一半以上保持一致，否则会引起______________反应而使移植失败。 (4)欲获得型号完全一致的器官或组织，患者的父母应求助于_____________技术，并做___________诊断。
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【简答题】Who are the two boys? Nora was six years old. She had a little brother. Her brother's name was Jim. Jim was sometimes naughty, but he made Nora laugh a lot, and she loved him and was always very n...
【单选题】She was always very generous in her ______, which aroused the attention from the public gradually.
A.
simplicity
B.
charity
C.
purity
D.
capacity
【单选题】She was always very _______ in her charity. She donated a lot of money to the sick children.
A.
fair-minded
B.
generous
C.
popular
D.
patient
【单选题】听力原文： Helen was a very successful businesswoman. She had always liked nice clothes. (33)And when she had left school she worked in a shop which sold them, not far from her home. After a few experiment...
A.
She worked in a clothing shop not far from home.
B.
She did experiments not far from her home.
C.
She stayed at home and designed clothes.
D.
She became a partner of an old lady.
【单选题】在人体八大系统中，具有调节功能的是（ ） ①消化系统 ②生殖系统 ③内分泌系统 ④泌尿系统 ⑤呼吸系统 ⑥运动系统 ⑦神经系统 ⑧循环系统．
A.
②⑥
B.
④⑤
C.
③⑦
D.
①⑧
【单选题】RLC组成的串联交流电路,接在电源电压为 V,电阻R=30Ω,电感L=382mH,电容C=40μH,求电路的功率因数λ。
A.
功率因数为0.6
B.
功率因数为0.7
C.
功率因数为0.5
D.
功率因数为0.8
【简答题】3 ________ was your grandmother like? ~ She
was very ________ - she always helped everyone. And she was ________ too. She
went to university.
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