If it ________ for their support, we would be in a very difficult position.
A.were not
B.is not
C.was not
D.be not
A.were not
B.is not
C.was not
D.be not
A.sup>131I-6-IC
B.sup>131I-MIBG
C.sup>131I-Nal
D.sup>131I-OIH
E.sup>131I-Lipiodol
整个生物界约有()种蛋白质。
A.108</sup>~109</sup>
B.109</sup>~1011</sup>
C.1010</sup>~1012</sup>
D.1011</sup>~1013</sup>
A.sup>99mTc-硫胶体
B.sup>99mTcO4-
C.sup>99mTc-RBC
D.sup>99mTc-EHIDA
E.sup>99mTc-ECD
A.sup>99mTc-MIBI
B.sup>99mTc-HSA
C.sup>99mTc-ECD
D.sup>99mTc-RBC
E.sup>99mTc-MAA
A.sup>99mTc-MDP
B.sup>99mTc-PHY
C.sup>99mTc-MIBI
D.sup>18F-FDG
E.sup>201Tl
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