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【简答题】
列出三种草坪草:__、__和野牛草等。
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【简答题】听力原文： In its most extreme form, poverty is a lack of basic human needs, such as adequate and nutritious food, clothing, housing, clean water, and health services./Extreme poverty can cause terrible su...
【简答题】第三章笔记2 第三章第二节 边缘分布- 需包含边缘分布函数的定义; 推导(X,Y)是连续型随机变量时的Y的边缘概率密度公式; 推导二维正态分布的X,Y的边缘概率密度。
【单选题】—Mr. Li ______ to Mary carefully when I entered the classroom this morning. —He is very patient ______ he is young.
A.
talking; but
B.
was talking; though
C.
talks; though
D.
talked; however
【简答题】Mary was reading. Harry entered. (when)
【简答题】社会主义的体现是一个()的过程,人们对社会主义本质的认识也随着实践的推进逐步深入。
【单选题】When I entered the classroom, I saw Mary ______ at the desk and ______ a letter.
A.
seating; writing
B.
seated; wrote
C.
sitting; wrote
D.
seated; writing
【单选题】Each of the following sentences contains ONE mistake. Find it out and correct it. Jack was washing dishes then Mary knocked at the door and entered.
A.
Jack was washing dishes as Mary knocked at the door and entered.
B.
Jack was washing dishes while Mary knocked at the door and entered.
C.
Jack was washing dishes when Mary knocked at the door and entered.
D.
Jack was washing dishes as soon as Mary knocked at the door and entered.
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