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【单选题】
人体组织内引起超声反射的条件是( )
A.
相邻的两种物质声阻抗相等
B.
相邻两种物质间声阻抗存在差别
C.
声波与界面垂直
D.
界面线度小于波长
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举一反三
【单选题】Lucy, don’t put your books on the floor. ____, please.
A.
Put them away
B.
Put them on
C.
Put away them
D.
Put on them
【简答题】补全对话。 Li Lei: Oh, it’s you, Lucy. 1._____to see you. Lucy: Nice to 2._____you, too. Mary. Li Lei: Come in, please, Mum, 3._____is Lucy, my friend. She 4._____ American. And this is my mother, Lucy. Mu...
【单选题】Lucy, don’t put your books on the floor. ____, please.
A.
Put them on
B.
 Put them away
C.
 Put on them
D.
 Put away them
【单选题】排列图法是将影响质量的因素按照其( )进行排列的。
A.
出现频率大小
B.
累计频率大小
C.
严重程度
D.
出现先后顺序
【判断题】算法要本着简单方便、可执行的原则.
A.
正确
B.
错误
【单选题】下列关于急性髓细胞白血病M3型,哪一项说法是错误的
A.
按细胞颗粒大小又可分为M3a、M3b两型
B.
三氧化二砷亦可用于该种类型白血病的治疗
C.
M3型即为急性粒细胞白血病未分化型
D.
该种类型白血病可并发DIC
【单选题】Lucy, don’t put your books on the floor. ____, please.
A.
Put them on
B.
. Put them away
C.
Put away them
【简答题】听句子,选择正确的答语。 (     )1. A. Her name is Lucy. (     )2. A. No, I don’t. (     )3. A. Hello! I’m Mike. (     )4. A. Yes, what’s up? (     )5. A. Thank you. B. She’s a student. B. Yes, please. B. Hello! T...
【单选题】Lucy, don’t put your books on the floor. ____, please. A. Put them on B. Put them away C. Put on them D. Put away them
A.
 Put them on
B.
 Put them away
C.
 Put on them
D.
 Put away them
【单选题】Lucy has already tried her best. Please don’t be too ______ about her job.
A.
curious
B.
special
C.
particular
D.
responsible
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