皮皮学，免费搜题
登录
搜题
【单选题】
等差数列a 1 ,a 2 ,a 3 ,...,a n 的公差为d,则关于数列ca 1 ,ca 2 ,ca 3 ,...,ca n (c为常数),说法正确的是( )。A.
公差为cd的等差数列
B.
公差为d的等差数列
C.
公比为cd的等比数列
D.
公比为d的等比数列
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】got woken up today by my daughter 's scream,“Dad ... it's snowing!"
【单选题】下列关于酶活性中心的叙述哪项不正确
A.
酶活性中心内有结合基团及催化基团
B.
酶活性中心只是必需基团的作用而与整个酶分子无关
C.
辅酶或辅基是必需基团之一
D.
酶活性中心结构需与底物分子相适应
E.
酶原无活性中心或活性中心被掩盖
【单选题】Base on "Dad": When my dog got run over :
A.
I was too young to understand my father’s words and wanted to escape
B.
I was comforted by my father’s words although I could understand him then
C.
My father comforted me silently with his big arms and his own tears
D.
My father failed to comfort me as I did not understand his thoughts
【单选题】下列关于酶活性中心的叙述哪项不正确?( )
A.
活性中心内有结合基团及催化基团
B.
活性中心只是必需基团的作用而与整个酶分子无关
C.
辅酶或辅基是必需基团之一
D.
活性中心构象需与底物分子相适应
【单选题】—Dad，it’s raining heavily and I haven’t got my umbrella．How can I go back home? —No worry，Honey！I’ll be right there to you ．
A.
take；up
B.
catch；up
C.
pick；up
D.
bring；up
【单选题】下列关于酶活性中心的叙述哪项不正确
A.
活性中心内有结合基团和催化基团
B.
酶活性只与活性中心有关，与酶分子其他部分无关
C.
辅酶或辅基是必需基团之一
D.
活性中心构象需与底物分子相适应
E.
活性中心必须具备特定的空间构象
【单选题】— ________________? — He's my dad. [ ]
A.
Who is my dad
B.
Who is your dad
C.
Who is the old man
D.
Who the old man is
【单选题】---Look! Dad, my College Graduation Certificate! I’ve got it! ---____dear! You have finally realized your dream.
A.
congratulation
B.
celebrations
C.
congratulations
D.
greetings
相关题目：