A、to going
B、go
C、to go
D、going
第1题:
17.
A. He’s
B. His
C. He
D. Him
第2题:
第3题:
79、推测下列气相反应自发的是
A.Kr++ He → Kr +He+
B.Si+ Cl+→ Si++Cl
C.Cl-+ I → I-+Cl
D.Cl-+ F→ F-+Cl
第4题:
You are signing on a deck officer,who will be designated as one of the GMDSS operators,before sailing foreign.Which statement is TRUE ________.
A.He/she must have an STCW certificate endorsed as“Valid for Service on Vessels Operating in the GMDSS System”
B.He/she must present either an FCC-issued license or a Coast Guard-issued license
C.You must consult the“List of Qualifications”on the reverse of his/her FCC-issued license
D.His/her Merchant Mariners Document must have an added endorsement as “Radio Electronics Officer”
第5题:
第6题:
推测下列气相反应自发的是
A.Kr++ He → Kr +He+
B.Si+ Cl+→ Si++Cl
C.Cl-+ I → I-+Cl
D.Cl-+ F→ F-+Cl