题目内容
（请给出正确答案）
A.inducing a mesodermal fate in nearby cells
B.helping to pattern the mesoderm along the dorso-ventral axis
C.specifying the dorsal region of the embryo
D.all of these events
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更多“The 'organizer' in Xenopus is …”相关的问题
A.bribed
B.supported
C.awarded
D.endowed
A.a;the;X
B.a;a;X
C.the;the;X
D.a;a;the
A.∫f'(x)dx=g(x)+C
B.∫d'(x)dx=f(x)+C
C.∫f(x)dx=g(x)+C
D.∫g(x)dx=f(x)+C
E.∫df(x)=g(x)+C
A.P{x≤0}=P(X≥0)=0.5
B.f(-x)=1-f(x)
C.F(x)=-F(-x)
D.P(X≥2}=P(X＜2)=0.5
A.P{X≤0}=P{X≥O}
B.P{X≤1}=P{x≥1}
C.F(-x)=F(x)
D.p(x)=p(-x)
设f(x)=ah(x)+(x-a)k(x)，h(x)≠0，k(x)≠0，且g(x)=(x-a)mh(x)，m≥1，
，a≠0，证明：
A.∃x∃y∀z(P(x,y)∨¬Q(z)∨R(x))
B.∃x∃y∃z(P(x,y)∨¬Q(z)∨R(x))
C.∃x∃y∀z(P(x)∨¬Q(z)∨R(x))
D.∃x∃y∀z(P(x,y)∨Q(z)∨R(x))
A.(∀x)(P(x)VQ(x)),P(x):x=1,Q(x):=2,论域:{1,2}
B.(∃x)(P(x)∧Q(x)):P(x):x=1,Q(x):=2,论域:{1,2}
C.(∃x)(P(x)→Q(x)):P(x):x＞2,Q(x):=0,论域:{3,4}
D.(∀x)(P(x)→Q(x)):P(x):x＞2,Q(x):=0,论域:{3,4}
