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【简答题】
在亲缘关系中,孝敬长辈通常含有两个方面的意思是:( ) A,敬重长辈 B,服从长辈 C,孝顺长辈 D,多给钱物
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举一反三
【单选题】下列关于质壁分离和复原实验的实验材料及外界溶液的叙述，正确的分别是（）。①实验材料必须是成熟的植物活组织细胞②细胞液最好有颜色，便于观察和判断细胞质壁分离和复原的程度③细胞液必须有颜色，否则不能发生质壁分离和复原实验④外界溶液的浓度应适中，不能过低或过高⑤外界溶液必须对细胞无毒害⑥外界溶液的浓度无特殊要求，任何浓度均可以
A.
①②，④⑤
B.
①③，④⑤
C.
①②，⑤⑥
D.
①③，⑤⑥
【单选题】下列有关质壁分离及复原实验的实验材料及外界溶液的叙述,正确的是( ) 1实验材料必须是成熟的植物活组织细胞 2细胞液必须有颜色 3细胞液最好有颜色 4外界溶液必须对细胞无毒害作用 5外界溶液浓度适中,不能过高或过低 6外界溶液的浓度无特殊要求,任何浓度均可
A.
①③④⑤
B.
①②④⑤
C.
①③④⑥
D.
①②④⑥
【单选题】洋葱是生物学实验的常用材料，其鳞片叶及根尖可用于不同的实验研究。下列关于洋葱在实验中的应用，叙述错误的是
A.
运用质壁分离与复原实验，可估测洋葱鳞片叶外表皮细胞液的浓度
B.
提取洋葱鳞片叶外表皮细胞液泡中的紫色色素，可使用清水作溶剂
C.
观察高等植物细胞有丝分裂的过程，宜选取洋葱根尖分生区细胞
D.
利用洋葱鳞片叶内表皮细胞进行实验，可观察到线粒体和叶绿体
【单选题】Which of the following stages involves international marketing the most? ( )
A.
infrequent foreign marketing
B.
regular foreign marketing
C.
global marketing
D.
international marketing
【单选题】Ideally, anatomical investigation consists of a combination of descriptive and experimental approaches. Present-day anatomy involves scrutiny of the structure of organisms at many levels of observatio...
A.
ysis
B.
recognition
C.
evaluation
D.
examination
【单选题】The process of marketing control involves ( ).
A.
Building the standard
B.
Performance evaluation
C.
Correcting deviation
D.
All above
【单选题】Globalizing marketing involves all of the following except:
A.
global coordination of marketing activities.
B.
some degree of marketing standardization.
C.
a degree of uniformity in the marketing mix.
D.
customization of products as per local preference.
【单选题】If we () hard in the past few years, things wouldn't be going so smoothly.
A.
hadn't been working
B.
aren't working
C.
weren't working
D.
didn't work
【单选题】If we___hard in the past few years. Things wouldn’t be going so smoothly.
A.
hadn’t been working
B.
are working
C.
were working
D.
worked
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