【題目】(2016·江蘇) Many young people, most __________ were well-educated, headed for remote regions to chase their dreams.
A. of which B. of them
C. of whom D. of those
科目:高中地理 來源: 題型:
【題目】下圖表示細胞內發生的一系列重大生命活動,請據圖回答下列問題:
(1)B過程表示一個細胞增殖產生的后代,在形態、結構和功能上發生 的過程。
(2)該生物為 生物,其中A過程的方式包括 。
(3)細胞識別是細胞信號傳導的前提,它是通過__________實現的,細胞識別的物質基礎是該結構上有____________。
(4)圖中對生物的生長(體積增大)起主要作用的過程是____________。
(5)圖中對生物體細胞種類的增多起主要作用的過程是____________。
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【題目】實驗一:用不帶特殊病原體的小鼠進行如下特異性免疫實驗,過程如下圖中①,結果如下圖中②。圖②中箭頭表示注射T細胞或血清的時間。
(1)實驗中,對B組小鼠的處理是作為A組小鼠的________處理。
(2)從圖②可知,Ⅱ組與Ⅳ組相比,小鼠脾臟中的活細菌數量的增長趨勢_______說明血清中的________不能有效抑制脾臟內的細菌繁殖。注射來自于A組小鼠的T細胞后,在4 d內I組小鼠脾臟中的活細菌數量________,說明該組T細胞(活化T細胞)________細菌數量的增長。由此推測該細菌生活在________。
(3)實驗中,IⅣ組小鼠感染的是________,感染的時間是在注射T細胞或血清的________d。
實驗二:在體外觀察小鼠的T細胞和巨噬細胞(一種吞噬細胞)對細菌X的殺傷力,結果如圖。
(4)由圖可知,能有效殺傷細菌X的是________細胞,而不是活化T細胞。
(5)有人假設,活化T細胞釋放某種物質活化了巨噬細胞。若用體外實驗驗證該假設,實驗組應選擇的實驗材料包括____________________。
a.培養過活化T細胞的培養液
b.培養過巨噬細胞的培養液
c.A組小鼠的巨噬細胞
d.B組小鼠的巨噬細胞
e.培養過未活化T細胞的培養液
f.細菌X
(6)該系列實驗的目的是研究_____________________。
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【題目】The performance was a great success because the orchestra was by an internationally famous conductor.
A. directed
B. performed
C.conducted
D. staged
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【題目】China’s economy is sure to develop very quickly ________ the new government is able to work scientifically
and practically.
A. even though B. in case
C. as though D. in that
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【題目】 (2017·江蘇) In 1963 the UN set up the World Food Programme, one of ____________ purposes is to relieve worldwide starvation.
A. which B. its C. whose D. whom
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【題目】 _______ not for the support of the teachers, the student could not overcome her difficulty.
A. It were B. Were it
C. It was D. Was it
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【題目】Professor Hawking asks his students to read the newspaper to keep _______ of current affairs.
A. watched B. observed C. informed D. noticed
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【題目】The pen ___________ he is writing is mine.
A. with which B. in which
C. on which D. by which
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