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【单选题】
不 需 要 细 胞 与 细 胞 之 间 接 触 的 基 因 重 组 类 型 有A.
接 合 和 转 化
B.
转 导 和 转 化
C.
接 合
D.
接 合 和 转 导
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【单选题】_____________itis in the center of the city, the hotel is not very expensive.
A.
Although
B.
Because
C.
Before
【简答题】Look and fill in the blanks. 看图填空。 1. What is it? It is . Where is it? It is . 2. What is it? It is . Where is it? It is . 3. What is it? It is . Where is it? It is . 4. What are these? They are . Whe...
【简答题】左表为某健康人血浆、原尿、尿液的成分及含量（单位：克/100毫升）．右图示肾单位的结构．请分析图 标回答问题． 主要成分 A B C 水 90 98 96 蛋白质 8.00 0.03 0.00 葡萄糖 0.10 0.10 0.00 无机盐 0.72 0.72 1.10 尿素 0.03 0.03 1.80 （1）分析数据可知：表中A、B、C三种液体分别是：A______；B______；C_____...
【简答题】看图填空。 1. What is it? It is _____________. Where is it? It is _____________. 2. What is it? It is _____________. Where is it? It is _____________. 3. What is it? It is _____________. Where is it? ...
【单选题】The job market has changed and our to finding work must change as well.
A.
way
B.
method
C.
means
D.
approach
【简答题】若数列{a n }满足a 1 =1， a n + a n+1 = ( 1 4 ) n （n∈N * ），设 S n = a 1 +4 a 2 + 4 2 a 3 +…+ 4 n-1 a n ，类比课本中推导等比数列前n项和公式的方法，可求得 5 S n - 4 n a n =______．
【简答题】肾上腺表面有结缔组织被膜，实质由周围的皮质和中央的髓质构成。皮质来自中胚层，腺细胞具有分泌类固醇激素细胞的结构特点；髓质来自外胚层，腺细胞具有分泌含氮类激素细胞的结构特点。皮质由外向内分为球状带、束状带和网状带。球状带细胞分泌盐皮质激素；束状带细胞分泌糖皮质激素；网状带细胞主要产生雄激素，也可以产生少量糖皮质激素和雌激素。髓质细胞分泌肾上腺素和去甲肾上腺素。
【单选题】A house may serve many purposes, but its main __________ is to provide shelter. [ ]
A.
rank
B.
approach
C.
function
D.
theme
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